My personal hope is for something along the lines of the Vision Pro providing me with some really killer virtual monitor arrangements. Or maybe just an iMax like view of my 3D projects or music scores. But it's the only currently available thing I see these being useful for.
And it's not a very well done thing, mostly due to the not so stellar resolution even in the middle of the field of view. Works for workload where one doesn't need super fine resolution (e.g.: video editing), but forget about using this with walls of tiny next (not usable for coding, for example).
Another use that some people have experimented and Apple has touted with their "spacial computing" moniker: leaving multiple windows and applet floating virtually around a large real-world space (e.g.: have various control apps for your widgets in the work area, have browser with receipe and cooking timer in your kitchen, etc.) so as you move between real-world space, you get the revelant stuff already open and floating wating for you.
The problem is that, at the price of that Apple asks for the Vision Pro, and at the price one finds electronics on, e.g., AliExpress: for the 3500 bucks that Apple asks for their "Spacial Computer", one can buy 35x sub 100 bucks no-name tablets, and leave actual tablets lying around the real world to have "already opened and ready to use apps" all-over. Meh.